Table 1

Incidence of postoperative symptomatic VTE

	Total cases	VTE		PE		PE with hypoxia		PE with shock		PE with arrest
Overall	203 943	137	(0.067%)	57	(0.028%)	35	(0.017%)	9	(0.004%)	6	(0.003%)
Surgical site		p<0.001		p<0.001		p<0.001		p<0.001		p<0.001
Brain	9299	15	(0.161%)	8	(0.086%)	1	(0.011%)	0	(0.000%)	0	(0.000%)
Thorax	11 100	4	(0.036%)	3	(0.027%)	2	(0.018%)	1	(0.009%)	1	(0.009%)
Cardiovascular	13 637	6	(0.044%)	1	(0.007%)	1	(0.007%)	1	(0.007%)	1	(0.007%)
Thorax and abdomen	1656	2	(0.121%)	0	(0.000%)	0	(0.000%)	0	(0.000%)	0	(0.000%)
Upper abdomen	27 035	17	(0.063%)	11	(0.041%)	8	(0.030%)	1	(0.004%)	0	(0.000%)
Lower abdomen	42 875	31	(0.072%)	16	(0.037%)	11	(0.026%)	3	(0.007%)	1	(0.002%)
Caesarean section	5056	0	(0.000%)	0	(0.000%)	0	(0.000%)	0	(0.000%)	0	(0.000%)
Head, pharynx, larynx	35 414	4	(0.011%)	2	(0.006%)	2	(0.006%)	0	(0.000%)	0	(0.000%)
Chest, abdominal wall, perineum	22 633	3	(0.013%)	2	(0.009%)	2	(0.009%)	0	(0.000%)	0	(0.000%)
Spine	7040	7	(0.099%)	3	(0.043%)	2	(0.028%)	1	(0.014%)	1	(0.014%)
Hip, upper/lower limbs	25 160	48	(0.191%)	11	(0.044%)	6	(0.024%)	2	(0.008%)	2	(0.008%)
Other	2038	0	(0.000%)	0	(0.000%)	0	(0.000%)	0	(0.000%)	0	(0.000%)

All data are described as numbers and percentages. The proportions of cases at each surgical site were compared using the χ² test.
PE, pulmonary embolism; VTE, venous thromboembolism.